Use the standard algorithm: 88.6 - 8.8. Show your regrouping or division steps.
79.8
Align decimal points; 88.6 - 8.8 = 79.8.
Day 004Subtracting Decimals
Standards 6.NS.B.3
LEARNING TARGET
I can subtract decimals and explain regrouping.
01 · LEARN
Build the idea
Align decimal points and add placeholder zeros. Regroup one whole as ten tenths, or one tenth as ten hundredths. Subtract by place and check by adding the difference to the subtrahend.
Use the standard algorithm: 3.22 - 0.48. Show your regrouping or division steps.
2.74
Align decimal points; 3.22 - 0.48 = 2.74.
02 · PRACTICE
Your turn
Work in order. Start with the foundations, then build toward explanation and application.
Use the standard algorithm: 65.1 - 7.8. Show your regrouping or division steps.
Use the standard algorithm: 83.1 - 5.3. Show your regrouping or division steps.
Use the standard algorithm: 21 - 1.5. Show your regrouping or division steps.
Use the standard algorithm: 6 - 3.77. Show your regrouping or division steps.
Use the standard algorithm: 8.13 - 6.6. Show your regrouping or division steps.
Use the standard algorithm: 4.25 - 3.3. Show your regrouping or division steps.
Use the standard algorithm: 3.27 - 0.44. Show your regrouping or division steps.
Use the standard algorithm: 9.14 - 0.87. Show your regrouping or division steps.
A tank holds 7.85 L. A class uses 0.15 L. How much remains?
A tank holds 4.73 L. A class uses 0.79 L. How much remains?
03 · CHECK
Answers and reasoning
Reveal the teacher answer key
- 57.3
Align decimal points; 65.1 - 7.8 = 57.3.
- 77.8
Align decimal points; 83.1 - 5.3 = 77.8.
- 19.5
Align decimal points; 21 - 1.5 = 19.5.
- 2.23
Align decimal points; 6 - 3.77 = 2.23.
- 1.53
Align decimal points; 8.13 - 6.6 = 1.53.
- 0.95
Align decimal points; 4.25 - 3.3 = 0.95.
- 2.83
Align decimal points; 3.27 - 0.44 = 2.83.
- 8.27
Align decimal points; 9.14 - 0.87 = 8.27.
- 7.7 L
Align decimal points; 7.85 - 0.15 = 7.7.
- 3.94 L
Align decimal points; 4.73 - 0.79 = 3.94.